Water Filter Replacement Discs, Replaces Mr. Coffee WFF-3 Water Filter Discs- Set of 12 For Best Results Replace Monthly Quality meets or exceeds original filter. Fits all Mr. Coffee machines that require a disc shape water filter. These replacement charcoal water filters are specifically designed for all mr coffee coffee makers that require water filters. Removes impurities (chlorine, odors, calcium & others) that interfere with taste and quality. High Quality 12-Pack of Replacment Charcoal Water Filters for Mr. Coffee Machines